segmental tubes

1 definition found

segmental tubes - Collaborative International Dictionary of English v.0.48 :

  Segmental \Seg*men"tal\, a.
     1. Relating to, or being, a segment.
        [1913 Webster]
  
     2. (Anat. & Zool.)
        (a) Of or pertaining to the segments of animals; as, a
            segmental duct; segmental papillae.
        (b) Of or pertaining to the segmental organs.
            [1913 Webster]
  
     Segmental duct (Anat.), the primitive duct of the embryonic
        excretory organs which gives rise to the Wolffian duct and
        ureter; the pronephric duct.
  
     Segmental organs.
        (a) (Anat.) The embryonic excretory organs of vertebrates,
            consisting primarily of the segmental tubes and
            segmental ducts.
        (b) (Zool.) The tubular excretory organs, a pair of which
            often occur in each of several segments in annelids.
            They serve as renal organs, and often, also, as
            oviducts and sperm ducts. See Illust. under
            Sipunculacea.
  
     Segmental tubes (Anat.), the tubes which primarily open
        into the segmental duct, some of which become the urinary
        tubules of the adult.
        [1913 Webster]